My 2 24" Apple LED LCD's Malfunctioning in 10.8.2

Discussion in 'OS X Mountain Lion (10.8)' started by 3282868, Oct 15, 2012.

  1. 3282868 macrumors 603

    Jan 8, 2009
    I have 2 ~2 year old Apple 24" LED LCD's running on my 12-Core mac pro. Recently one dropped brightness levels periodically, even shutting off completely. During a genius appointment, the same display acted in the same manner running off an in-store MacBook Pro with 10.8.2. The tech and I both agreed it must be power supply related as the backlighting seemed fine in checks.

    Having moved, I postponed fixing it until settled. Suddenly, both displays began showing the same behavior. I was able to attach them to my Mac Pro without the USB/Mini-display port extension cables, and it seemed to make a difference. However, I've noticed flickering from time to time. I installed "Snow Leopard", and haven't experienced these issues in 10.6 or Windows 7 64-bit. Not once in a few weeks.

    This leads me to suspect 10.8.2 is the cause. Anyone with a similar setup experiencing this phenomenon?

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